<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="isAll" /> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <Tr v-for="(item,index) in list" :key="index"
         :item="item"
         :index="index"
         @delFn="delfun"
         
        >
          
        </Tr>
      </tbody>
      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">
            {{ allCount}}
          </td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import Tr from './components/Tr.vue'
export default {
  data() {
    return {
    };
  },
  components:{
   Tr
  },
  computed:{
    list(){
      return this.$store.state.goodList
    },
    isAll:{
      set(val){
        this.list.forEach(item => item.checked = val)
      },
      get(){
        return this.list.length && this.list.every(item => item.checked )
      }
    },
    allCount(){
      return this.list.reduce((sum,item) => {
        return this.list.length >0 ? sum += item.num * item.price : 0
      },0)
    }
  },
  methods:{
    delfun(index){
      this.list.splice(index, 1)
    }
  }
};
</script>

<style>
</style>